Reciprocating-saw mill



w. M. WILKIN. -RBGIPRUGATING SAW MILL.

Patented Mar. 16, 1886.

Inventor.

m2 j h/ Per. W Q Atty.

, n Nu l g j Q A fim a w WK Q I U H 1 m I 1 I E d w A (No Model.)

UNITED STATES PATENTWQEEIQEI,

\V'ILLIAM M. VVILKIN, OF ERIE, PENNSYLVANIA.

RECIPROCATING-SAW MILL.

SPECIFICATION forming part of Letters Patent No. 338,124, dated March 16, 1886.

Application filed July 27, 1885. Serial No. 172,784.

To all whom it may concern.-

Be it known that I, WILLIAM M. WILKIN, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Reciprocating-Saw Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of reoiprocating-saw mills which are known as gangs, and it consists in certain improvements thereimwhich will be hereinafter fully described, and pointed out in the claims.

My invention consists in combining with the saw-sash a counter-balance or compensating-balance, in the manner and for the purposes hereinafter set forth.

My invention is illustrated in the accompanying drawings, as follows: Figure 1 is a side elevation of a gang-saw millhaving therein embodied my improvement-s. Fig. 2 is a front elevation of the same.

A is the frame.

13 is the sash.

D is the main crank-shaft which drives the sash.

G is the connectingrod between the sash and the main crank-shaft.

F is the counter-balance.

E E are connecting-rods between the main crank-shaft and the counter-balance.

a a are the guides on the sides of the frame in which the sash and counter-balance slide.

(2 and cl cl are the cranks of the crankshaft D.

bis the slot for receiving and holding the saw-buckles.

Z/ is a groove forming a catch in the lower end of the sash over which the lower sawbuckles hook.

I) b are the guide-ribs on the sides of the sash.

b is the noddle-pin of the sash.

A are side pieces bearing the guides a.

The counter-balance consists of the weight F, and it is applied by providing the crankshaft with two extra cranks, d d, and the (No model.)

frame with baseguides a,to receive the guideribs on the ends of the weight.

The purpose of the counter-balance is obviously to prevent jar in the reciprocation of the sash and to divide the load or labor of reciprocating the sash throughout the revolution of the crank-shaft. Its use greatly economizes the life of the machine, as it prevents concussion and strains from the reciprocation of the sash, and hence a higher rate of speed may be attained, and it economizes in the source of power necessary to drive the sash as the load is distributed.

An engine driving this mill will require much less steam to do the work than it would if the load were not thus distributed.

Another advantage is, that the mill does not require so firm 'a foundation. Ordinary gang-mills require a very firm foundation of stone, and are therefore expensive to erect. By using the compensating-balance as I have shown it the mill may be set up on timbers. It is common to counterbalance the sash by a counter-weight on a disk on the crankshaft; but this, if heavy enough to really counterbalance the sash, will cause great lateral throw or vibration.

I desire to be understood as not claiming any form of rotating counter-balance.

What I claim as new is- 1. In a reciprocating-saw mill, the combination, with a vertically-guided saw-frame, of a vertically-guided counterbalance and a crank-shaft and connections for reciprocating said frame and counter-balance simultaneously in opposite directions.

2. In a gang-saw mill, the combination, substantially as shown, of a reciprocating saw-sash, a crank-shaft and connecting-rod for reciprocating said sash, and a counterbalance guided below the crank-shaft and connected to a crank in said crank-shaft, which stands opposite the crank which moves the saw-sash.

3. In a reciprocating-saw mill, the combination of a frame-work, a saw frame or sash. mounted so as to be reciprocated in said frame-work, a counter-weight mounted so as to be reciprocated in said frame-work, a crank-shaft having opposite cranks mounted in said frame-work between the said sawframe and the said counterweight, and connecting-rods connecting said oppositely-placed cranks with the saw-frame and the counterweight, in a manner substantially as shown, whereby the said saw-frame and counterweight will be simultaneously reciprocated by said crank-shaft.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM M. XVILKIN.

l Vitnesses:

JNo. K. HALLOCK, RoBT. H. PORTER. 

